Phonograph.



N. H'. HOLLAND;

PHONOGRAPH.'

APPLICATION FILED MAR. 2I, I9I4.

Panfd OCI. 5, 1915.

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NEWMAN H. HOLLAND, F WEST ORANGE, NEW

PATENT COMPANY, OF lWEST ORANGE, NEW JERSEY, A CORPORATON 0E NEW JERSEY.

' To all 'whom-t may concern:

usual sound box stylus upon the record is effected by the action of gravity upon the sound box itself, the latter being preferably mounted for up and down movement about a horizontal axis located eccentrically with respect to thersame. 1n the preferred form of my invention,.the sound box is carried by a support which tracks the phonographic record and servesto take a part of the weight of the sound box 0d the stylus.

- The invention is primarily intended for use in connection with electro-magnetically operable phonographic recorders, Abut it is not limited to such use. y

In order that my invention may bemore clearly` understood, attention is hereby directedto the'acc'on'lpa'nying drawings forming sa part of this specification and in Figure 1 is a view partly inside elevation and partly in section of one form of my in- 35 ventlon applied to an electro-magnetically 4operable honograph recorder; Fig. 2 is a bottom p ain viewof the same; Fig. 3 is a view`of the same partly in front elevation and partly in section; Fig. fl is a view partly in sideele'fation and partly in section of a modification; and Fig. 5 is' a bottom plan viewl of the modication.

In allthe views, like parts by .the-same reference numer ls.

-The recorder shown comprises a cylindrical casing l provided with an electromagnet 2, the coils of which are electrically connected with binding posts 3 and 4 supported by but insulated from the casing 1. These .binding posts are adapted to be connected respectively to the leads 5 and 6 of' an electric circuit which may contain a suitable telephone transmitter andsoul ce of electric supply (not shown). 'The casing 1 is provided.,q with and carries a vibratory dia- .Specication of Letters Patent.

are i designated PHONOGRAPH.

Patented oet. a, rais.

Application filed March 21, 1914. Sra1No. 826,138.

phragm 7, thev upper surface of which may have secured thereto a metallic plate 8 adapted to be attracted by the electromagnet 2 when the latter is energized. The diaphragm 7 also has secured thereto a stylus arm or lever 9 which carries a recording stylus 10 adapted to engage and operate upon a record cylinder 11.' When electric undulations or impulses are impressed upon the circuit containingthe leads 5 and 6, the diaphragm 7 and stylus 10 are set into vibration by the action of the magnet 2 upon the metallic plate 8." The specific construction described in this paragraph is well known and is not herein claimed per' se.

The sound box hereinbefore described is supported by a cradle l2 provided with alined outwardly extending arms 13 which have outer upwardly extending end portions 14 carrying alined pivot screws 15, the latter being provided with conical ends 16 engaged in correspondingly shaped recesses in extensions 17 of the casing 1. The axes of the pivots l5 extend through the 'casing 1 parallel to the diaphragm 7 and are located a considera-ble distance to one side of the, central axis and the center of gravity of the casing, so that the sound box ahas a tendency to move downwardly by gravity about the axes of the pivots toward the record cylinder 11 and to force the stylus 10 against and aslight distance into the said cylinder. The cradle 12 is provided with a curved downwardly extending projection or ball advance 18 arranged to bear upon the cylinder 11 at a slight disl'tance to one side of the stylus 10, the cradle JERSEY, ASSIGNOR TO NEW JERSEY weight of the sound box off the stylus 10.

` The cradle 1.2 is provided with an elongated central opening'l'zg thrQllgh which thestylus arm 9 extends.l `dan;` 'air`n 2Q extends from the cradle 12 at right anglesto the arms 13 and is pivoted for up and down movement as at 21, to the support "22, which may be the usual traveling sound box carrier a-rm of a phonograph. A screw 23 adjustably mounted in the arm 20 at-a point more remote from the sound box thanthe pivot 21 is arranged to bear on the under side of the support 22 to limit t-he downward movement of the cradle 12 and the sound box carried thereby. By pivoting the cradle 12 as at .21, the cradle and the sound box are permitted to'l move freely up and down during .the making of a record and are thereby free to remain in operative engagement with. the cylmderll regardless of the. eccentricity or similarA irregularities in' the said cylinder. .v The tendency of the sound' box to move downwardly by gravity about th'e'pi'vots-ll may be counterbalanced to a'desired'e'xtent as by a tension spring-24 secured at one end to the forward end vof the cradle-12, .the

said spring being secured at its other end to afflat elastic'member 25 secured at its inner end in engagement with the top of the .casing l, as by bolt :A headed screw 26 threaded through the-member 25 bears upon the top ofithe casing 1 to permit adjustment of the member 25 for the purpose of vary'- ing the tension of the spring 24. For any given' adjustment, the 'spring 2a exerts a substantially constant counterbalancing force, so that by asuitable adjustmentof ,the screw'y 26, the lunbalanced downward amount.

pressure' of the sound boxl on the stylus 10 may be regulated to' "a desired fixed In the modification Ashownin Figs. i-land.

5,- the pivoted' cradle support of thesound box is omitted, thefsoun'd box being sup-` ported from the forked extension 27 ofthe phonographicl carrier arm 2 2".- The pivots 15 pass through the outer ends of the forked extension 27 and have their conical inner ends located in vcorrespondingly shaped ref i cesses in the extensions 17 of the casing 1. The location of the axes of the' pivots 15' with respect-to the sound. box is the samethe pivots 15 shown inA Figs.

Hav-ing now described my invention vvwhat 1 I claimas new and desire to protect by Letters Patent of the United States is as .follows: vl. Ina 'device combinationof means for trackirig ai record, and a` sound box provided with a v1- ,bratory member anuv a stylusconnected' to said vibratory member, said sound. box` be.

ing vpivotally supported ,by s'aidftracking means for up and down movement about an gravity of said 'sound box',` substantially as described. r

2. In a device of the `class described', the combination of means for 'tracking a sound l lrecord, a sound box provided with a vibramy invention is not,

of the. class described,` the 'resist "downward movement of said sound vbox with respect'tfo said tracking means,

substantially as described.

3.In a device ofi-the class described, the

combination of meansfor tracking a sound q -jtory vmember and-astylus connected to said [-vi'bratory member, saidsound box being pivoted to ksaid'trackingg; means for up and down lmovement :aboiitan axis located to one yside of the center of gravity of said sund box, and adjustable- `means tending to resist downward movement oi said sound box vwith' respect to said tracking means, substantially as'describedf 4. In a device of the class described, the combination of recordtracking means pivoted for-movement' about'a given axis, and a soundibox provided with 'a vibratory member andastylu'sfconnected to .said vibratory 85 member, said sound box being' pivpted to sald tra-cking meansafor movement about an vvaxis located to one side ofV the center ofv gravty of lsaid sound'box and substantially para .'iially as described. v

- 5. In a devicezof `the class described,the combination of' record tracking means pivot- .ed for movement about a given axis, a sound a .stylus connected to said vibratory member, saidsound'boxbeing pivoted tosaid track- ,ing means for movement about an axis lo cated. to one vside of the center of gravity of record, a sound box provided with a vibraf box providedI with avibratory member and saids'ound boxand substantially' parallel to 100 said first named axis, vand means forlimiting the-'pivotal' movement of said tracking means, substantially as described.

6.v In ,a device of. .the class described, the

.combinationof means-for' tracking a sound 195 record, a sound 'box provided with a vibra tory member and a stylus connected to said pivoted to said tracking means for up and downmovement about an axis located to l one side cfg-the centerof gravity o f said resist downward lmovement of said sound sound box,fand-resi1ient means tending to" boxwith; respect to said tracking means, 115

` record, a sound box provided with a vibra-N l vaxis located to one .side 'of .the -center of tory member and astylus connected to said 'vibratory member, said sound box being 120 tory member anda stylus connected tosaid substantially constant force to resist downvibratory member, said soundl box being pivotally supported by said tracking means for up and down movementabout an axis located to' one side ofthe center of gravity y of said sound box, and means tending to l ward movement of said sound boxwitli rel spectto said tracking means, substantially 'asdescribedp .s ,.82 In a 4device ofthe"cil-ass described,

combination of record 't lelf-tofsaidv first named axis, substan-7 90 f vibratory member, said, sound box being ed for movement about a substantially horizonta'l axis, and a sound box provided With a vibratory member and a stylusfconnected to such vibratory member, said sound box being supported by said tracking means for up and down movement with respect to said means, substantially as described.

9. In a device of the class described, the combination of record tracking means pivoted for movement about a substantially horizontai axis, a sound box provided with a vibratory member and a stylus connected to said vbratory member, said sound box be- Gopies of this patent may be ing supported by said tracking means for up anddown movement vvith respect to sald means, and means exerting a substantially V constant force to resist downward movement NEWMAN H. HOLLAND.

Witnesses: A

FREDERICK BACHMANN, MARY J. LAIDLAW.

obtained for five-cents each, by addressing' the Commissioner of Patents,

Washington, D. C. 

